arnica (arnica montana, Arnicare, Arniflora) (cont.)

Pharmacy Author:
Medical and Pharmacy Editor:

DRUG INTERACTIONS: There are no significant drug interactions, when using topical forms of arnica. Arnica may increase the effect of anticoagulants and other drugs that increase the risk of bleeding when taken orally.

PREGNANCY: There are no adequate studies done on arnica to determine safe and effective use in pregnant women. It is considered unsafe during pregnancy. Arnica has been used to cause abortions.

NURSING MOTHERS: It is not known whether arnica enters breast milk; therefore, it is best to be cautious before using it in nursing mothers.

SIDE EFFECTS: Arnica should not be applied to open wounds or mucous membranes. Arnica also may give mild odor when applied. Undiluted oral forms are considered unsafe and have been reported to cause cardiac arrest, fast heart beat, shortness of breath, stomach pain, diarrhea, and vomiting. Pure arnica is considered an unsafe herb by the FDA.

REFERENCE: FDA Poisonous Plant Database.


Medically Reviewed by a Doctor on 6/13/2014


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